[Update] 更新dockerfile

Dockerfile

@@ -6,7 +6,8 @@ RUN useradd jumpserver
 
 COPY ./requirements /tmp/requirements
 
-RUN yum -y install epel-release && rpm -ivh https://repo.mysql.com/mysql57-community-release-el6.rpm
+RUN yum -y install epel-release && \
+      echo -e "[mysql]\nname=mysql\nbaseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql57-community-el6/\ngpgcheck=0\nenabled=1" > /etc/yum.repos.d/mysql.repo
 RUN cd /tmp/requirements && yum -y install $(cat rpm_requirements.txt)
 RUN cd /tmp/requirements && pip install --upgrade pip setuptools && \
     pip install -i https://mirrors.aliyun.com/pypi/simple/ -r requirements.txt || pip install -r requirements.txt